from django.db import models
from django.contrib.auth.models import AbstractUser
from itsdangerous import TimedJSONWebSignatureSerializer as TJSSerializer, BadData
from django.conf import settings

from meiduo_mall.utils.models import BaseModel

# Create your models here.
class User(AbstractUser):
    #继承AbstractUser这个类，这个类中本身写了一些关于用户的一些字段，继承就好
    """用户模型"""
    mobile = models.CharField(max_length=11, unique=True, verbose_name='手机号')
    email_active = models.BooleanField(verbose_name='邮箱激活状态', default=False)

    class Meta:
        db_table = 'tb_users'
        verbose_name = '用户'
        verbose_name_plural = verbose_name


    def generate_email_verify_url(self):

        """生成邮箱激活url"""
        # 生成serializer加密对象
        serializer = TJSSerializer(settings.SECRET_KEY, 24 * 60 * 60)

        data = {'user_id':self.id, 'email':self.email}

        token = serializer.dumps(data).decode()
        # 返回激活url
        return "http://www.meiduo.site:8080/success_verify_email.html?token=%s" % token


    @staticmethod
    def check_verify_email_token(token):
        """对激活邮箱token解密并返回"""
        # 创建itsdangerous序列化器对象

        serializer = TJSSerializer(settings.SECRET_KEY, 24 * 60 * 60)
        try:
            # 对token进行解密
            data = serializer.loads(token)
        except BadData:
            return None # 如果没有解开 返回None

        else:
            # 如果解密成功获取 user_id和email用此数据获取要激活邮箱的user

            user_id = data.get('user_id')
            email = data.get('email')

            try:
                user = User.objects.get(id=user_id, email=email)

            except User.DoesNotExist:
                return None

            else:
                return user  # 注意不要写成User


class Address(BaseModel):
    """
    用户地址
    """
    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='addresses', verbose_name='用户')
    title = models.CharField(max_length=20, verbose_name='地址名称')
    receiver = models.CharField(max_length=20, verbose_name='收货人')
    province = models.ForeignKey('areas.Area', on_delete=models.PROTECT, related_name='province_addresses', verbose_name='省')
    city = models.ForeignKey('areas.Area', on_delete=models.PROTECT, related_name='city_addresses', verbose_name='市')
    district = models.ForeignKey('areas.Area', on_delete=models.PROTECT, related_name='district_addresses', verbose_name='区')
    place = models.CharField(max_length=50, verbose_name='地址')
    mobile = models.CharField(max_length=11, verbose_name='手机')
    tel = models.CharField(max_length=20, null=True, blank=True, default='', verbose_name='固定电话')
    email = models.CharField(max_length=30, null=True, blank=True, default='', verbose_name='电子邮箱')
    is_deleted = models.BooleanField(default=False, verbose_name='逻辑删除')

    class Meta:
        db_table = 'tb_address'
        verbose_name = '用户地址'
        verbose_name_plural = verbose_name
        ordering = ['-update_time']
